Opinion
KATZ, J.
The dispositive issue in this appeal is whether the plaintiffs, who opposed the restart of a nuclear generating unit, were excused from having to exhaust all administrative remedies with the department of environmental protection (department) before seeking injunctive relief in the Superior Court because the administrative remedies available to them were futile or inadequate.
[3]*3The plaintiffs1 brought this action in the trial court seeking to enjoin the restart of a nuclear generating unit (unit 2), owned and operated by the named defendant, Northeast Utilities Service Company.2 The defendants moved to dismiss the action on jurisdictional grounds, claiming that the plaintiffs had failed to exhaust their administrative remedies with the department, and that the department had primary jurisdiction over the issues raised in the plaintiffs’ complaint. The trial court, Hon. Norris L. O’Neill, judge trial referee, denied the defendants’ motion. Thereafter, the trial court, Hon. Robert J. Hale, judge trial referee, granted a temporary restraining order enjoining the restart of unit 2, pending a ruling on the plaintiffs’ application for a temporary and permanent injunction. Judge Hale ultimately rendered judgment for the defendants and dissolved the temporary restraining order. The plaintiffs appealed from the judgment of the trial court to the Appellate Court, and we transferred the appeal to this court pursuant to General Statutes § 51-199 (c) and Practice Book § 65-1. We now vacate the judgment and remand the case to the trial court with direction to render judgment dismissing the action.
The following facts are pertinent to this appeal. The Millstone Nuclear Power Generating Station (Millstone) consists of three nuclear power units. Each unit is [4]*4equipped with a “once-through condenser cooling system” that draws large volumes of seawater from Niantic Bay into the units through an intake structure. The water is used to cool the units and is later discharged into Long Island Sound. When the present action was brought on March 11, 1999, units 1 and 2 had been shut down due to safety violations unrelated to the once-through cooling system.3
The defendants hold a National Pollutant Discharge Elimination System (NPDES) permit, authorizing the use of the once-through condenser cooler water system for Millstone.4 In accordance with the provisions of the federal Clean Water Act; see footnote 4 of this opinion; that certain requirements must be satisfied before a permit may be issued or renewed, the defendants’ permit contains the express findings made by the department that: (1) the use of a once-through condenser [5]*5cooling system adequately ensures the projection and propagation of a balanced indigenous population of marine organisms and wildlife; and (2) the cooling water intake structure at Millstone represents the best available technology for minimizing environmental impacts.5
The defendants’ permit was issued by the department on December 14,1992, and was due to expire on December 13,1997.6 The defendants submitted a timely permit [6]*6renewal application with the department on June 7, [7]*71997. That application is still pending. The 1992 permit, however, will remain in effect until the renewal application has been finally resolved by the department. See General Statutes § 4-182 (b).* ****7 Pursuant to General Statutes § 22a-19, Fish Unlimited has intervened in the proceeding before the department and has requested a hearing on the defendants’ application.8
[8]*8Although Fish Unlimited intervened in the defendants’ permit renewal proceeding before the department, the plaintiffs brought this action9 alleging that the once-through condenser cooler water system in place at unit 2 causes “unreasonable pollution, impairment and destruction of the public trust in the air, water and other natural resources of the state within the meaning of . . . General Statutes § 22a-16.”10 Specifically, the plaintiffs maintained that the system contributes significantly to the virtual demise of the winter flounder population in the Niantic River, and to the serious depletion [9]*9of other aquatic species that are entrained and impinged at the unit 2 intake structure.11 They also contended that the cooling waters, which are discharged into Long Island Sound as heated effluent, contain toxic contaminants and radioactive waste products that further harm the environment. In addition, the plaintiffs alleged that “[a] feasible and prudent alternative to the once-through condenser cooling system is available consistent with the reasonable requirements of public health, safety and welfare within the meaning of . . . General Statutes § 22a-17.”12 Accordingly, the plaintiffs sought to enjoin the restart of unit 2 and to require conversion of the once-through cooling system to a closed cooling system, which they claimed would reduce substantially the occurrence of larval entrainment. The plaintiffs also [10]*10sought an injunction requiring the defendants to install a fish return system, which they claimed would reduce mortality of marine organisms subject to impingement.
On March 22, 1999, the defendants moved to dismiss the complaint, asserting that the plaintiffs had failed to exhaust their administrative remedies before the department, and that the department had primary jurisdiction over the issues raised in the plaintiffs’ complaint. That motion was denied by Judge O’Neill on the ground that resort to the available administrative remedies would be futile and inadequate in light of the alleged harms created by the once-through condenser cooler water system because of the imminence of the peak spawning season for winter flounder. The court made no ruling in regard to future motions to dismiss that the defendants might submit after the period of peak spawning season had passed.
Thereafter, a trial commenced before Judge Hale on the plaintiffs’ application for a temporary injunction. On April 20, 1999, the plaintiffs filed an application for a temporary restraining order to enjoin the restart of unit 2 until after the trial court had ruled on the application for a temporary injunction. Judge Hale granted the plaintiffs’ application for a temporary restraining order, pending completion and presentation of all the evidence. After thirteen days of testimony, Judge Hale denied the plaintiffs’ application for temporary and permanent injunctive relief, and dissolved the temporary restraining order.13
On appeal, the plaintiffs claim that Judge Hale improperly concluded that the plaintiffs were not entitled: (1) to present rebuttal testimony; (2) to present summations and closing argument; and (3) to temporary [11]*11and permanent injunctive relief. The defendants dispute the plaintiffs’ claims and assert, as an alternative ground for affirmance, that the trial court lacked jurisdiction to adjudicate the plaintiffs’ claims because they had failed to exhaust their administrative remedies before the department, and because the department has primary jurisdiction over the issues raised in the plaintiffs’ complaint. We agree with the defendants’ alternative argument, namely, that the plaintiffs failed to exhaust their administrative remedies and, therefore, we vacate the judgment of the trial court.14
The defendants contend that the plaintiffs’ claims should have been dismissed by the trial court on jurisdictional grounds because the plaintiffs failed to exhaust their administrative remedies. Specifically, the defendants maintain that the remedies sought by the plaintiffs were available through the permit renewal proceeding pending before the department.15 The plaintiffs, however, assert that under the circumstances of this case, they were not required to exhaust their administrative remedies because recourse to the administrative remedies would have been futile and inadequate.
“It is a settled principle of administrative law that if an adequate administrative remedy exists, it must be exhausted before the Superior Court will obtain juris[12]*12diction to act in the matter.” (Internal quotation marks omitted.) Housing Authority v. Papandrea, 222 Conn. 414, 420, 610, A.2d 637 (1992); Cannata v. Dept. of Environmental Protection, 215 Conn. 616, 622, 577 A.2d 1017 (1990); Connecticut Life & Health Ins. Guaranty Assn. v. Jackson, 173 Conn. 352, 358-59, 377 A.2d 1099 (1977). “We have frequently held that where a statute has established a procedure to redress a particular wrong a person must follow the specified remedy and may not institute a proceeding that might have been permissible in the absence of such a statutory procedure.” Norwich v. Lebanon, 200 Conn. 697, 708, 513 A.2d 77 (1986); Cannata v. Dept. of Environmental Protection, supra, 215 Conn. 623. “[B]ecause the exhaustion doctrine implicates subject matter jurisdiction, we must decide as a threshold matter whether that doctrine requires dismissal of the plaintiff [s’] claim.” (Internal quotation marks omitted.) Housing Authority v. Papandrea, supra, 420; Concerned Citizens of Sterling v. Sterling, 204 Conn. 551, 556, 529 A.2d 666 (1987); see also Concerned Citizens of Sterling v. Sterling supra, 557 (“whenever a court discovers that it has no jurisdiction, it is bound to dismiss the case, without regard to [its] previous rulings”).
“The doctrine of exhaustion is grounded in a policy of fostering an orderly process of administrative adjudication and judicial review in which a reviewing court will have the benefit of the agency’s findings and conclusions.” (Internal quotation marks omitted.) Housing Authority v. Papandrea, supra, 222 Conn. 420; Concerned Citizens of Sterling v. Sterling, supra, 204 Conn. 557. “The doctrine of exhaustion furthers the salutary goals of relieving the courts of the burden of deciding questions entrusted to an agency ... in advance of possible judicial review.” (Internal quotation marks omitted.) Housing Authority v. Papandrea, supra, 420; Concerned Citizens of Sterling v. Sterling, supra, 556. [13]*13In addition, the administrative agency may be able to resolve the issues, making judicial review unnecessary. As the United States Supreme Court has stated, [a] complaining party may be successful in vindicating his rights in the administrative process. If he is required to pursue his administrative remedies, the courts may never have to intervene. McKart v. United States, 395 U.S. 185, 195, 89 S. Ct. 1657, 23 L. Ed. 2d 194 (1969).” (Internal quotation marks omitted.) Housing Authority v. Papandrea, supra, 420-21; Pet v. Dept. of Health Services, 207 Conn. 346, 351-52, 542 A.2d 672 (1988).
“The [exhaustion] doctrine is applied in a number of different situations and is, like most judicial doctrines, subject to numerous exceptions.” McKart v. United States, supra, 395 U.S. 193; Johnson v. Dept. of Public Health, 48 Conn. App. 102, 112, 710 A.2d 176 (1998). “[W]e have recognized such exceptions only infrequently and only for narrowly defined purposes”; (internal quotation marks omitted) Polymer Resources, Ltd. v. Keeney, 227 Conn. 545, 561, 630 A.2d 1304 (1993); Pet v. Dept. of Health Services, supra, 207 Conn. 353; such as when recourse to the administrative remedy would be futile or inadequate. In light of the policy behind the exhaustion doctrine, these exceptions are narrowly construed. See, e.g., Simko v. Ervin, 234 Conn. 498, 507, 661 A.2d 1018 (1995) (plaintiffs’ mere suspicion of bias on part of defendant, without more, not sufficient to excuse them, on ground of futility, from exhaustion requirement); O & G Industries Inc. v. Planning & Zoning Commission, 232 Conn. 419, 429, 655 A.2d 1121 (1995) (actual bias, rather than mere potential bias, of administrative body renders resort to administrative remedies futile); Polymer Resources, Ltd. v. Keeney, supra, 561 (mere conclusory assertion that agency will not reconsider decision does not excuse compliance, on basis of futility, with exhaustion requirement); Housing Authority v. Papandrea, supra, 222 Conn. 430 (fact [14]*14that commissioner previously indicated how he would decide plaintiffs claim did not excuse compliance, on ground of futility, with exhaustion requirement); Concerned Citizens of Sterlings. Sterling, supra, 204 Conn. 557-60 (futility is more than mere allegation that administrative agency might not grant relief requested).
The plaintiffs recognize the exhaustion doctrine, but assert that they are excused from compliance because the injunctive relief they seek was not available through the administrative process. Specifically, they contend that the permit renewal proceeding was inadequate because: (1) it would not redress the environmental problems associated with the use of a once-through cooling system; and (2) it is unlikely that the department will conduct a hearing on the matter in the foreseeable future, thus causing further harm to the winter flounder population and the waters of Long Island Sound. Although we agree that a party is not required to exhaust an administrative remedy when that remedy necessarily will be futile, we disagree with the plaintiffs’ characterization of their administrative remedy in this case.
An administrative remedy is futile or inadequate if the agency is without authority to grant the relief requested. Cannata v. Dept. of Environmental Protection, supra, 215 Conn. 625. The department in this case, however, had the authority to grant the plaintiffs’ requested relief during the permit renewal proceeding in which Fish Unlimited had intervened.
First, pursuant to § 22a-430 (a),16 before renewing the defendants’ permit, the department must review all of its prior determinations that the defendants’ cooling system is consistent with the provisions of the federal Clean Water Act, which requires that the cooling water intake structure represent “the best available technology for minimizing environmental impacts.” See 33 [15]*15U.S.C. § 1326 (b).17 Thus, the department will evaluate the environmental problems associated with the use of a once-through cooling water system. The department also will determine whether these problems warrant the conversion of unit 2 to a closed cooling water system and whether the installation of a fish return system is needed. Adjudication of the claims raised in the plaintiffs’ complaint requires the trial court to make the same determinations.
Second, General Statutes § 22a-718 provides the department with broad authority to issue cease and desist orders, with which it effectively could enjoin the defendants from restarting unit 2. Third, § 22a-430 (b)19 [16]*16requires the department to provide public notice of [17]*17its tentative determination regarding a permit renewal application and to provide for a period of public comment before a final determination is made on the application. Pursuant to that same section, the commissioner of environmental protection “may hold a public hearing prior to approving or denying any application if in his discretion the public interest will be served thereby, and he shall hold a hearing upon receipt of a petition signed by at least twenty-five persons.” General Statutes § 22a-430 (b). Finally, General Statutes § 22a-437 provides that any person aggrieved by a decision of the department to grant or deny a permit pursuant to § 22a-430, has the right, after a hearing, to appeal the final determination of the department to the Superior Court.20 We conclude, therefore, that the plaintiffs had the opportunity to raise the issues in their complaint before the department, and that the department had the authority to grant the relief that the plaintiffs requested from the trial court.
The plaintiffs also contend that the permit renewal proceeding is inadequate because it is unlikely that the [18]*18department will conduct a hearing on the matter in the foreseeable future, thus causing more harm to the winter flounder population and the waters of Long Island Sound. In support of this allegation, the plaintiffs note that although the defendants’ permit expired two years ago, the department has not yet begun hearings addressing their renewal application. We repeatedly have held, however, that “[d]irect adjudication even of constitutional claims is not warranted when the relief sought by a litigant might conceivably have been obtained through an alternative [statutory] procedure . . . which [the litigant] has chosen to ignore.” (Internal quotation marks omitted.) Polymer Resources, Ltd. v. Keeney, supra, 227 Conn. 563; Pet v. Dept. of Health Services, supra, 207 Conn. 354. In the present case, the plaintiffs could have obtained relief through an alternative statutory procedure, namely, past permit renewals. Millstone has been the subject of department reviews, approvals, and permits for more than twenty-five years. The plaintiffs, however, have failed to intervene in any of these proceedings, many of which addressed the very issues that they claim justify the trial court’s intervention. The plaintiffs cannot now benefit from this deliberate decision to wait until the eleventh hour, claim futility or inadequacy, and then request that the trial court step in and issue relief that is properly within the authority and expertise of the department.
The plaintiffs, at oral argument before this court, acknowledged that they could have intervened in the defendants’ earlier permit renewal proceedings before the department. They claim, however, that it would have been futile to pursue that option because the department would have denied the relief requested. Specifically, the plaintiffs claim that, as a result of the “close coordination” between the department and the defendants, the department is biased in favor of granting the defendants’ permit renewal application.
[19]*19Although a party is not required to exhaust an administrative remedy that is futile or inadequate, “we have never held that the mere possibility that an administrative agency may deny a party the specific relief requested is a ground for an exception to the exhaustion requirement.” Concerned Citizens of Sterling v. Sterling, supra, 204 Conn. 559. Rather, we have held that, “[i]t is futile to seek a remedy only when such action could not result in a favorable decision and invariably would result in further judicial proceedings.” (Emphasis added; internal quotation marks omitted.) Simko v. Ervin, supra, 234 Conn. 507. Here, the plaintiffs have failed to show, in effect, that the outcome of the defendants’ permit renewal application has been predetermined by the department. Indeed, the plaintiffs have offered no evidence of bias. Their allegation is merely speculative. See O & G Industries, Inc. v. Planning & Zoning Commission, supra, 232 Conn. 429 (when party’s suspicion of bias on part of zoning commission is purely speculative, such suspicion does not render exhaustion of administrative remedies futile); LaCroix v. Board of Education, 199 Conn. 70, 84-85, 505 A.2d 1233 (1986) (“the statutory remedies are not rendered futile by the plaintiffs conclusory assertion that requesting and attending a hearing before the defendant board would have been pointless in the face of the board’s earlier decision to terminate his employment”). “We presume that administrative board members acting in an adjudicative capacity are not biased.” Simko v. Ervin, supra, 508; O&G Industries, Inc. v. Planning & Zoning Commission, supra, 429. The plaintiffs’ unsupported allegation that the department was predisposed to renew the defendants’ permit is not enough to overcome that presumption. Consequently, the plaintiffs’ mere assertion of bias on the part of the department, without more, is not sufficient to excuse them, on the ground of futility, from exhausting available administrative remedies.
[20]*20In LaCroix v. Board of Education, supra, 199 Conn. 70, this court explained why unsupported allegations that an administrative agency is biased are insufficient to establish that exhaustion of administrative remedies would be futile or inadequate. The plaintiff in LaCroix was a tenured teacher who challenged, on due process and breach of contract grounds, the termination of his contract by the defendant board of education (board). Id., 71-72. A hearing was scheduled after the board voted to terminate him. Id., 73. The record does not indicate whether a hearing was held in the plaintiffs absence. Id., 73 n.4. Thereafter, the board notified the plaintiff that, following the board’s last regular meeting, it had terminated his employment, and further advised him that he could request a hearing. Id., 73-74. The plaintiff did not request a hearing, however, contending that exhaustion of administrative remedies was not required because the remedy would have been inadequate or futile in light of the board’s previous decision to terminate his employment. Id., 84-85. We rejected the plaintiffs’ argument, stating: “Had the plaintiff requested and attended a hearing following the board’s . . . letter, he would have been able to raise the issue of lack of impartiality in an administrative appeal. ‘By not appearing before the board, the plaintiff not only deprived the defendant board of the opportunity to hear, analyze and review a matter within its responsibility and expertise, but also deprived [him]self of the opportunity to put on [his] case and to make a proper record on which to seek judicial relief in the event [he] was terminated.’ [Cahill v. Board of Education, 198 Conn. 229, 241-42, 502 A.2d 410 (1985).]” LaCroix v. Board of Education, supra, 85.
In the present case, by failing to exhaust their administrative remedies, the plaintiffs, like the plaintiff in Lacroix, deprived the department of the opportunity to review a matter within its responsibility and exper[21]*21tise. The plaintiffs also denied this court the benefit of the department’s findings and conclusions concerning the environmental problems associated with the use of a once-through cooling system, an area that is clearly better addressed by the department. See Housing Authority v. Papandrea, supra, 222 Conn. 420 (“ ‘[t]he doctrine of exhaustion is grounded in a policy of fostering an orderly process of administrative adjudication and judicial review in which a reviewing court will have the benefit of the agency’s findings and conclusions’ ”); Concerned Citizens of Sterling v. Sterling, supra, 204 Conn. 557 (same). In addition, the plaintiffs denied themselves the ability to make a record on which to seek judicial relief, in the event that the department renewed the defendants’ permit. Finally, had the plaintiffs requested relief from the department, they would have been able to raise the claim of bias on appeal.
We conclude that the plaintiffs have failed to exhaust their administrative remedies and that their failure to do so was not excused by any exception to the exhaustion requirement. The trial court, therefore, did not have subject matter jurisdiction to entertain the plaintiffs’ application for injunctive relief.
The judgment is vacated and the case is remanded to the trial court with direction to render judgment dismissing the action.
In this opinion the other justices concurred.